The clinic is getting busy with more HTML5 ailments! This week, we’ll cover the separation of formatting and content, custom elements, using aside for social links, sections with no visible titles, and canvas in the DOM.

While many HTML4 elements have been brought into HTML5 essentially unchanged, several historically presentational ones have been given semantic meanings. Let’s look at <i> and <b> and compare them to the semantic stalwarts <em> and <strong>.